T-Mobile currently has the only 3G network in the US that is compatible with European carriers (i.e. that uses the 1700/2100 MHz frequency-band). Only T-Mobile phones can be used on non-US 3G networks. AT&T phones do not work on European 3G networks. It can be expected that T-Mobiles phones will at some point no longer work on the AT&T network and that we will be forced to switch to devices that do not work abroad. What a shame. This deal must be stopped